Efficient Selective Feedback Design for Multicell Cooperative Networks

Date Added: Jul 2010
Format: PDF

Multicell Cooperative Processing (MCP) has been recognized as a promising technique for increasing spectral efficiency of future wireless systems. Unfortunately the provided benefits of downlink MCP come at the cost of increased radio feedback and backhaul overhead; in FDD systems users need to feedback their Channel State Information (CSI) to the network infrastructure and user data needs to be exchanged between all cooperating Base Stations (BSs). For conventional non-cooperative networks it has been suggested that the radio feedback load can be reduced by preventing users with low quality channels from feeding back their CSI (concept of selective feedback), at the cost of a small fraction of the multiuser diversity gain.